In a recent survey, buyers were asked a series of questions with regard to Internet usage. One question asked was how they would use the Internet if security and other issues could be resolved. Suppose that 78% said they would use it for pricing information, 75% said they would use it to send purchase orders, and 70% said they would use it for purchase order acknowledgments. Assume that these percentages hold true for all buyers. A business analyst randomly samples 20 buyers and asks them how they would use the Internet if security and other issues could be resolved.
a. What is the probability that exactly 14 of these buyers would use the Internet for pricing information?
b. What is the probability that all of the buyers would use the Internet to send purchase orders?
c. What is the probability that fewer than 12 would use the Internet for purchase order acknowledgments?